![]() ![]() In terms of fruit quality, although fruit weight, sugar content, and acidity did not show any trends between the treatments, firmness was reduced below 3.0 LAI treatments. In terms of reproductive growth, the number of flowers did not show significant differences between the control and the LAI treatments, but the number of fruits in the ‘Poongyoung’ cultivar seemed to increase with the higher LAI treatment. ![]() In terms of the vegetative growth of tomatoes, the smaller the LAI, the greater the plant height of the crops. We compared the tomato growth according to five leaf-area treatments: non-defoliation (control), LAI (2.5), LAI (3.0), LAI (3.5), and LAI (4.0). Irrigation was controlled based on accumulated radiation. The greenhouse environments were managed to maintain a relative humidity of 38–90% and temperature of 15–35 ☌. We ran the experiment from May 28 to September 16, 2019, with various leaf-area index (LAI) treatments. In the experiment, tomato seedlings of ‘Super334’ and ‘Poongyoung’ were used. Therefore, this study was conducted to quantify the relationship between leaf area and two cultivars of tomato plants in a greenhouse in the northeast Asian climate. However, there are few studies that quantify the relationship between leaf area and crop growth according to various climatic conditions for tomato crops. Leaf area is related to canopy photosynthesis and production of crops. All rights reserved.Photosynthesis in plants depends on various vegetative growth factors, such as leaf age, leaf area, and leaf number. We recommend more research on the measurements of these variables and on the development of 2-D and 3-D gas diffusion models, since these do not require the diffusion pathway length in the stroma as predefined parameter.Ĭ(3) Diffusion Leaf anatomy Mesophyll conductance Mesophyll resistance Photosynthesis.Ĭopyright © 2015 Elsevier Ireland Ltd. Some variables (diffusion pathway length in stroma, diffusion coefficient of the stroma, curvature factors) substantially affected the predicted CO2 assimilation. Next, we conducted a similar analysis for assumed diffusive properties and curvature factors. We did a sensitivity analysis to assess how the rate of CO2 assimilation responds to changes in various leaf anatomical properties. There was generally a good agreement between the predicted and measured light and CO2 response curves. ![]() We parametrized the model by gas exchange, chlorophyll fluorescence and leaf anatomical measurements from three tomato cultivars. We combined a model that quantifies the diffusive resistance for CO2 using anatomical properties, a model that partitions this resistance and an extended version of the Farquhar-von Caemmerer-Berry model. Biochemical processes add or remove CO2 along its diffusion pathway through mesophyll. Leaf anatomical structures act as physical barriers for CO2 transport. The CO2 concentration near Rubisco and, therefore, the rate of CO2 assimilation, is influenced by both leaf anatomical factors and biochemical processes. ![]()
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